<template>
    
    <el-container class="home-container">
        <!-- 头部区域 -->
        <el-header>
            <div>
                <img src="../assets/heima.png" alt="">
                <span>后台管理系统</span>
            </div>
            <el-button type="info" @click="logout">退出</el-button>
        </el-header>
        <!-- 页面主体区 -->
        <el-container>
            <!-- 侧边栏 -->
            <el-aside :width="isCollapse ? '64px' : '200px'">
                <div class="toggle-button" @click="toggleCollapse">|||</div>
                <!-- 侧边栏菜单区 -->
                <el-menu
                    background-color="#333744"
                    text-color="#fff"
                    active-text-color="#409EFF" router unique-opened :collapse="isCollapse" 
                    :collapse-transition="false" :default-active="activePath">
                    <!-- 一级菜单 -->
                    <el-submenu :index="item.id + ''" v-for="item in menulist" :key="item.id">
                        <!-- 一级菜单的模板区域 -->
                        <template slot="title">
                            <!-- 图标 -->
                            <i :class="iconsObj[item.id]"></i>
                            <!-- 文本 -->
                            <span>{{ item.authName }}</span>
                        </template>
<!-- 二级菜单 -->
<el-menu-item :index="'/' + subItem.path" v-for="subItem in item.children" :key="subItem.id" @click="saveNState('/' + subItem.path)">
    <template slot="title">
                                <!-- 图标 -->
                                <i class="el-icon-menu"></i>
                                <!-- 文本 -->
                                <span>{{subItem.authName}}</span>
                            </template>
</el-menu-item>
</el-submenu>

</el-menu>
</el-aside>
<!-- 右侧主体 -->
<el-main>
    <router-view></router-view>
</el-main>
</el-container>
</el-container>
</template>

<script>
    export default {
        data() {
            return {
                // 左侧菜单数据
                menulist: [],
                iconsObj: {
                    '125': 'iconfont icon-user',
                    '103': 'iconfont icon-tijikongjian',
                    '101': 'iconfont icon-shangpin',
                    '102': 'iconfont icon-danju',
                    '145': 'iconfont icon-baobiao'
                },
                // 是否折叠
                isCollapse: false,
                // 被激活的连接地址
                activePath: ''
            }
        },

        created() {
            this.getMenuList()
            this.saveNavState = window.sessionStorage.getItem('activePath')
        },
        methods: {
            logout() {
                console.log('beidiaoyongle1');
                window.sessionStorage.clear();
                this.$router.push("/login");
            },
            async getMenuList() {
                const {
                    data: res
                } = await this.$http.get('/menus')
                if (res.meta.status != 200) return this.$message.error(res.meta.msg)
                this.menulist = res.data
            },
            // 点击按钮，切换菜单的折叠与展开
            toggleCollapse() {
                this.isCollapse = !this.isCollapse
            },
            // 保存链接的激活状态
            saveNState(activePath) {
                console.log(activePath)
                window.sessionStorage.setItem('activePath', activePath)
                this.activePath = activePath
            }
        }
    };
</script>

<style lang="less" scoped>
    .home-container {
        height: 100%;
    }
    
    .el-header {
        background-color: #373d41;
        display: flex;
        justify-content: space-between;
        padding-left: 0;
        align-items: center;
        color: #fff;
        font-size: 20px;
        >div {
            display: flex;
            align-items: center;
            span {
                margin-left: 15px;
            }
        }
    }
    
    .el-aside {
        background-color: #333744;
        .el-menu {
            border-right: 0;
        }
    }
    
    .el-main {
        background-color: #EAEDF1;
    }
    
    .iconfont {
        margin-right: 10px;
    }
    
    .toggle-button {
        background-color: #4A5064;
        font-size: 10px;
        line-height: 24px;
        color: #fff;
        text-align: center;
        letter-spacing: 0.2em;
        cursor: pointer;
    }
</style>